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Foliar application of humic acid or a mixture of catechol and vanillic acid enhanced growth and productivity of alfalfa

  • Khaleda, Laila (Division of Applied Life Science (BK21Plus), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Research Institute of Life Sciences (RILS), Gyeongsang National University) ;
  • Kim, Min Gab (College of Pharmacy and Research Institute of Pharmaceutical Science, PMBBRC, Gyeongsang National University) ;
  • Jeon, Jong-Rok (Department of Agricultural Chemistry and Food Science & Technology, Institute of Agriculture and Life Science (IALS), Gyeongsang National University) ;
  • Cha, Joon-Yung (Division of Applied Life Science (BK21Plus), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Research Institute of Life Sciences (RILS), Gyeongsang National University) ;
  • Kim, Woe-Yeon (Division of Applied Life Science (BK21Plus), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Research Institute of Life Sciences (RILS), Gyeongsang National University)
  • Received : 2017.09.12
  • Accepted : 2017.09.19
  • Published : 2017.09.30

Abstract

Humic acid (HA) is known to consist of various kinds of polymeric organics, their detailed structures can vary depend on sample sources such as organic manure, composts, peat, and lignite brown coal, and largely exists in grassland soils. HA possesses diverse positive effects that not only increase plant growth but also improve soil fertility. Recently, we have manufactured a co-polymeric product of catechol and vanillic acid (CAVA) synthesized artificially, and found that CAVA as a HA mimic increases seed germination and salt tolerance in Arabidopsis. In this study, we examined whether HA or CAVA affects to seedling growth in alfalfa. Foliar application of HA or CAVA increased alfalfa seedling growth including aerial and in root parts. HA or CAVA dramatically enhanced size of leaf and root, whereas HA significantly displayed higher bioactivity than CAVA. Taken together, CAVA acts like as a HA mimic in alfalfa that could apply as an alternation supplement to enhance plant growth and productivity.

Keywords

References

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